charging port problem st-16

Something strange has happened to my ST 16 .. I plugged it in this morning at 70% and it didn't do anything, I tried it again and waited and it showed charging but it was not charging it dropped to 60%, then when unplugged from the charger tapping the screen still shows charging. I have to...

Hi everyone.The problem i am having is when i try and charge my st16 controller it is showing the charging battery on the screen doing what it is supposed to do when charging but instead of the battery charging it is actually discharging.i started charging yesterday when the battery was showing...